Lock.



D. N. WEATHERS.

LOCK.

APPLICATION FILED DEO. 3, 1910.

1,010,992. l Patented Deo. 5, 1911.

, WLM/moge@ W I @mfg/Mw UNITED STATES PATENT OFFICE.

DAVID N. WEATHERS, OF MABENGO, INDIANA, ASSIGNOR OF ONE-HALF TO N. A. y

.ALFORD, 0F ALGIERS, PIKE COUNTY, INDIANA.

LOCK.

Specification of Letters Patent.

Patented Dec. 5, 1911.

Application filed December 3, 1910. Serial No. 595,389.

To all whom it may concern:

Be it known that I, DAVID N. WEATHERS, a citizen of the United States,residing at Marengo, in the county of Crawford and State of Indiana,have invented new and useful Improvements in Locks, of which thefollowing is a specification.

This invention relates to improvements in locks and has particularreference to that type of locks usually placed upon doors.

The primary object of the invention is the l provision of a lockprovided with a locking bolt normally held in retracted position andoperable by a key to move into projected position to engage the usualkeeper on the door-frame and when in this last-named position to bepositively held against movement in either direction so that when thekey is removed therefrom it will be impossible to manipulate the bolteither with the proper key or any other instrument,` lapy plied from theexterior of the door.

With the above and other objects in view, which will more fullyhereinafter. appear, the present invention consists in* certain noveldetails of construction and arrangement of parts, hereinafter fullyvdescribed, illustrated in the accompanying drawings, and moreparticularly pointed out in the appended claim; it being understood thatvar1- ous "changes in the form, proportion, size, andminor details ofthe device may be made, within the scope of the appended claim, withoutdeparting from the spirit or sacrificing any of the advantages of theinvention. f

In the accompanyingl drawings, forming part of the specification,-Figure 1 kis a side elevation of the device with the outer plate ofthe lock casing removed and showing the lock in projected position andheld against longitudinal movement. Fig. 2 1s a sectional plan view onthe line 2 2 of Fig. 1 with 'the means for holding the bolt againstmovement removed. Fig. 3 is a side elevation of the key for actuatingthe bolt. Fig. 4 is a similar View of the key or keeper for holding thebolt against movement when in projected position.

Similar numerals of reference are employed to designate correspondingpartsv numerals, 9 and 10, the outer face plate 9 being providedadjacent to one end with an opening for the'reception of the shank 11 ofthe door knob and further provided adjacent to its opposite end` and tothe lower side 6 with a key-hole 12. The casing is interlorly dividedinto two compartments by means of a partition 13. Arranged in thecompartment between the partition and inner face plate 9 is the usuallatch 14, connected in any suitable manner with the shank y11 o f theknob so that when the latter is partially turned the latch will beretracted. Arranged in the opposite compartment or that between theouter face plate and partition 18 is the device forming the subjectmatter of the present invention and including a -bolt 15. This bolt isheld between a pair of guide plates 16 and17, which are suitably securedto the adjacent face of the partition, the adjacent sides of the guideplates being 1n spaced relation andnicely receiving the .bolttherebetween. The medial portion of the lower side of the bolt or thatadjacent to the guide plate 17 is provided with Ia longitudinal recess,and extending laterally from the partition and through the recess of thebolt is a pin 18. The pin 18, when the bolt is in retracted position,lies adjacent to the forward end of the recess, and insertible into therecess with its opposite ends bearing on the pin 18 and the inner end ofthe said recess is a helical thrust spring 19. The thrust spring 19 issupported by the lower guide plate 17 and corresponds in length,approximately to the distance between the pin 18 and remote end of therecess and by virtue of its position holds the bolt in re. tractedposition. The .portion of the lower kside ofthe bolt beyond the outerend of the recess 1s in alinement with the key-hole12, and formed in theside portion of the bolt are a plurality of rack teeth 20.

The key for actuating the bolt to move to projected position comprises ashank 21, one end of which is provided with a finger-hold 22, and theopposite end portion of which is provided with a pinion 23. Thepinion'is of a size to pass through the key-hole 12, and the extremitalportion of the shank lying beyond the pinion is received by an openingin the partition, this opening forming a Inl-'"-Y journal for the keywhen the latter is being turned. Tith this construction it will bemanifest when the key is inserted into the key-hole and its innerextremital portion engages with the opening in the partition, the teethof the pinion 23 will engage with the teeth of the lock bolt so that byturning the key to the left the lock bolt will be moved to projectedposition. It will be manifest when the lock bolt is moved to projectedposition and the key removed from the casing that by virtue of theaction of the spring, it being understood that the latter is compressedwhile the lock bolt is moving to projected position, the said springwill immediately restore the lock bolt to its normal retracted position.It will be understood of course that the end 8 of the frame of the lockcasing is provided with an opening through which the engaging end of thebolt passes when the said bolt is being moved to projected position.

In order that the lock bolt may be positively held in projected positionand incapable of being actuated by the key therefor the followingconstruction is employedz-By reference now to the drawings it will beseen that the upper side 5 of the lock frame is provided adjacent to itsouter end with a vertical opening, which communicates with thecompartment between the partition and outer plate 9 of the casing.Formed in the upper side of the lock bolt l5, and at a point adjacent tothe outer end thereof is a socket 24, which alines with the verticalopening in the upper side 5, when the bolt 15 is fully projected. Vhatwill subsequently be termed a locking key is shown to include acylindrical shank portion 25, one end of which terminates in afinger-hold 2G. The shank portion 25 is of a size to nicely pass throughthe opening in the upper side 5, its lower end portion being somewhatreduced and loosely received by the socket 24. Inasmuch as the length ofthe shank is somewhat greater than the distance between the inner end ofthe socket and outer face of the upper side 5, it will be manifest whenthe shank of the keeper is inserted through the opening in A`the upperside 5 and into the socket that the fingerhold 26 will be above theupper side 5 of the frame, so that the keeper may be readily withdrawnwhenever desired. With this construction it will be manifest when thekeeper is in engagement with the socket of the lock bolt and the latterfully projected the bolt will be positively held against movement evenwhen the proper key is applied to the lock and actuated in the mannerbefore described, the said lock bolt will remain in projected positionuntil the keeper is removed, whereupon the spring will restore the boltto its normal retracted position.

From the foregoing, it is evident that I have provided a device which iscomparatively simple in structure and inexpensive to manufacture,embodying few parts and these so arranged that the danger of derangementwill be reduced to a minimum.

I claim A lock comprising a casing having a keyhole opening in one sidethereof, a pair of spaced guide plates arranged within the casing, theupper guide plate being provided near its forward end with a verticalopening extending therethrough, a bolt slidingly fitted between saidguide plates and provided in its upper forward edge with a socketadapted to aline with the opening of the guide plate when the bolt isprojected, the lower forward edge of said bolt being provided with rackteeth to engage a pinion key insertible through the key-hole. the rearportion of the lower edge of the locking bolt being recessed, anupstanding lug on the lower guide plate projecting into the recess atthe forward end thereof, a thrust spring arranged within the said recessand bearing upon the upstanding lug and the rear portion of the lockingbolt, said spring serving to hold the bolt normally retracted, and alocking key insertiblefthrough the casing and the upper guide plate torest upon the upper edge of the bolt whereby the lower portion of thekey will gravitate into the said socket upon the projecting of the bolt.

In testimony whereof I aiiix my signature in presence of two witnesses.

DAVID N. VEATHERS.

Tit-nesses THOMAS J. Ross, J AMES M. VVEATHERS, Jr.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

